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Cracking aspect of test specimens at lap-spliced region: (a) 120-0-0; (b) 120-15db-0; (c) 120-10db-0; (d) 120-5db-0; (e) 180-0-0; (f) 180-15db-0; (g) 180-10db-0; (h) 180-5db-0; (i) 120-10db-V1.5; (j) 120-5db-V1.5; (k) 180-10db-V2.0; (l) 180-5db-V2.0; (m) 120-0-V1.5; (n) 180-0-V2.0; (o) 180-0-V1.5; (p) 180-5db-V1.5; (q) 180-10db-V1.0; (r) 180-5db-V1.0.
